function email(user, domain, suffix,txt){
   if (txt==1)
        document.write('<a href="' + 'mailto:' + user + '@' + domain + '.' + suffix + '">' + user + '@' + domain + '.' + suffix + '</a>');
        else document.write('<a href="' + 'mailto:' + user + '@' + domain + '.' + suffix + '">' + txt + '</a>');
}